<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<style>
	.asd{
		width: 1200px;
		height: 1200px;
		background: url(img/img02.jpg) 440px 150px no-repeat, url(img/img01.jpg) 0 0 no-repeat;
		background-size: 100px,600px;
		/*可以控制背景的位置，而且可以覆盖*/
	}
	</style>
</head>
<body>
	<div class="asd"></div>
</body>
</html>